Scilab Function
Last update : April 1993

trfmod - poles and zeros display

### Calling Sequence

  `[hm]=trfmod(h [,job])`

### Description

To visualize the pole-zero structure of a SISO transfer function `h` .

  job='p': visualization of polynomials (default)
  job='f': visualization of natural frequencies and damping

Interactive simplification of `h`. `trfmod` opens a dialog window.

### See Also

`poly`, `simp`,